Uncertain Saturated Discrete-Time Sliding Mode Control for A Wind Turbine Using A Two-Mass Model

International audienceThe aim of this paper is to propose a new design variable speed wind turbine control by discrete-time sliding modeapproach. The control objective is to obtain a maximum extraction of wind energy, while reducing mechanical loadsand rotor speed tracking combined with an electromagnetic torque. For this application, we designed a discrete timesliding mode control using the equivalent discrete time reaching law. Furthermore, a systematic and improved designprocedure for uncertainties discrete-time sliding mode control (SMC) with saturation problem is provided in this paper.The saturation constraint is reported on inputs vector. LMI technique and polytopic models are used in the design ofthe switching surface. To achieve some performance requirements and good robustness, in the sliding mode, the poleclustering method is investigated. Based on the unit vector control approach, a robust control is developed, then, todirect and maintain the system states onto the sliding manifold in finite time. Finally, a systematic design procedure forDSMC required to achieve a given performance level is provided and its effectiveness is varied by applying it to variablespeed wind turbine systems